A novel method was developed for the synthesis of tetrazoles from amides utilizing diphenyl phosphorazidate or bis(p-nitrophenyl) phosphorazidate as both the activator of amide–oxygen for elimination and azide source. Various amides were converted into the corresponding tetrazoles in good yields. This synthetic method allows to prepare 1,5-disubstituted and 5-substituted 1H-tetrazoles from various
[EN] INHIBITORS OF RENAL OUTER MEDULLARY POTASSIUM CHANNEL<br/>[FR] INHIBITEURS DU CANAL POTASSIQUE MÉDULLAIRE EXTERNE RÉNAL
申请人:MERCK SHARP & DOHME
公开号:WO2016008064A1
公开(公告)日:2016-01-21
Compounds of Formula I and the pharmaceutically acceptable salts thereof are provided as inhibitors of the ROMK (Kir1.1) channel. The compounds may be used as diuretic and/or natriuretic agents and for the therapy and prophylaxis of medical conditions including cardiovascular diseases such as hypertension, heart failure and chronic kidney disease and conditions associated with excessive salt and water retention.
Improved conditions for converting sterically hindered amides to 1,5-disubstituted tetrazoles
作者:Gretchen M. Schroeder、Sydney Marshall、Honghe Wan、Ashok V. Purandare
DOI:10.1016/j.tetlet.2010.01.024
日期:2010.3
Improved conditions for converting amides into 1,5-disubstituted tetrazoles are described. The optimum reaction conditions [diisopropyl azodicarboxylate (DIAD), diphenylphosphoryl azide (DPPA), and diphenyl-2-pyridyl phosphine in THF at 45 °C] converted stericallyhinderedamides to their corresponding tetrazoles in good yield.
Tetrazoles were effectively synthesized from amides using diphenyl phosphorazidate or bis(p-nitrophenyl) phosphorazidate in the presence of aromaticbases. Various amides underwent the proposed cycloaddition reaction to provide the corresponding tetrazoles. Studies on the racemization of chiral substrates were also performed. Overall, the proposed synthesis method enables the preparation of 1,5-disubstituted
Inhibitors of the renal outer medullary potassium channel
申请人:MERCK SHARP & DOHME CORP.
公开号:US10208064B2
公开(公告)日:2019-02-19
The present invention provides compounds of Formula (I) and the pharmaceutically acceptable salts thereof, which are inhibitors of the ROMK (Kir1.1) channel. The compounds may be used as diuretic and/or natriuretic agents and for the therapy and prophylaxis of medical conditions including cardiovascular diseases such as hypertension, heart failure and chronic kidney disease and conditions associated with excessive salt and water retention.